package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo {
    public static void main(String[] args) {
//        Collection c=new ArrayList();
//        c.add("one");
//        c.add("two");
//        c.add("three");
//        c.add("one");
//        System.out.println(c);
//        System.out.println(c.size());
//        c.clear();
//        System.out.println(c.size());
//        System.out.println(c.isEmpty());


        Collection c = new ArrayList();
        c.add(new Point(1, 2));
        c.add(new Point(3, 4));
        c.add(new Point(5, 6));
        c.add(new Point(7, 8));
        c.add(new Point(9, 0));
        c.add(new Point(1, 2));
        System.out.println(c);

        Point p = new Point(1, 2);
        boolean contains = c.contains(p);
        System.out.println(contains);
        c.remove(p);
        System.out.println(c);
        c.remove(p);
        System.out.println(c);
        Collection cc = new ArrayList();
        Point pp = new Point(1, 2);
        cc.add(pp);
        System.out.println(pp);
        System.out.println(cc);
        pp.setX(100);
        System.out.println(pp);
        System.out.println(cc);
    }
}
